Philadelphia Flyers right wing Scott Hartnell will be out four to eight weeks with a broken bone in his foot. / Eric Hartline, USA TODAY Sports

by Mike Brehm, USA TODAY Sports

by Mike Brehm, USA TODAY Sports

With a long lockout, a short training camp and 48 games in 99 days, the NHL was expected to see its share of injuries.

Throw some friendly fire into the mix, too.

The Toronto Maple Leafs and Philadelphia Flyers on Thursday announced the prognosis for players who were hit by teammates' shots the night before.

Maple Leafs winger Joffrey Lupul, who was signed to a five-year extension earlier this week, will be out a minimum of six weeks with a broken arm. He was hit by Dion Phaneuf's shot.

The Flyers' prognosis for Scott Hartnell, hit by Kimmo Timonen's shot, was less certain.

"He's got a broken first metatarsal in his left foot," Flyers general manager Paul Holmgren told news reporters in Philadelphia. "Right now we're talking with the doctors on what the best way to proceed is in terms of how to approach this. I can't give you a timeframe, it's probably going to be between four to eight weeks. â?¦ Obviously it's a significant injury."

The Flyers had to juggle all of their lines Thursday night because of a one-game suspension to Brayden Schenn. Claude Giroux's new linemates were Wayne Simmonds and Matt Read.

Philadelphia will bring back former Flyers winger Mike Knuble for help. He agreed to a a one-year deal and needs to pass a physical on Friday.

The 40-year-old unrestricted free agent suit up for the Flyers for four seasons and played the past three seasons for the Washington Capitals. He had been with the Grand Rapids (MIch.) Griffins of the American Hockey League this season.